Buffing or polishing device



- (No Model.)

H. A. WEBSTER. BUFPING OR POLISHING DEVICE.

N0. 578,958. Patented Mar.V 16, 1897.

WTNEESESI ma 4M x- Nirn Sterns HAROLD A. VEBSTER, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TO THE GLOBE BUFFER COMPANY, OF BOSTON, MASSACHUSETTS.

BUFFING OR POLISHING DEVICE.

SPECIFICATION forming part of Letters Patent No. 578,958, dated March 16, 1897.

Application filed August 2, 1895. Serial No. 558,030. (No model.)

To a/ZZ whom t may concern: be more or less wrinkled and its inner or un- Be it known that I, HAROLD A. NVEBSTER, der edge exposed and caught bythe work. of Haverhill, in the county of Essex and State My present invention has for its object to of Massachusetts, have invented certain new obviate this difficulty, and it consists in an 55 5 and useful Improvements in Bufiing or Iolappliance of the character specified comprisishing Devices, of which the following is a ing a yielding roll or cushion having cover speciiication. securing or Clamping devices at its ends and This invention relates to a rotary cylinder a iiexible cover wrapped or wound helically used for bufiing or for polishing articles on the roll, so that its overlapping edge pre- 6o io pressed against its periphery. An appliance sent-s a continuous helix, the ends of the of this class comprises a cylindrical yielding cover being secured bysaid fastening devices.

roll or cushion aiiiXed to a rotary hub or Of the accompanying drawings, forming a shaft and a flexible cover detachably secured part of this speciiication, Figure l represents to said roll. Then the appliance is used for a plan view of a buiiing or polishing appli- 65 i5` buffing or abrading, the cover is of sandpaance embodying my invention. Fig. 2 repper or emery-cloth, and when the appliance resents an end view of the saine. Fig. 3 repis used for polishing the cover is of some soft resents a section on line 3 3 of Fig. l. Fig. material, such as silesia. Owing to the nairepresents aplan view of the preferred form ture of the service demanded of these covof cover. 7o 2o ers, they are rapidly worn out and have to be The saine letters of reference indicate the frequently renewed. It has been found very same parts in all the figures. convenient to cut out the covers in the forni In the drawings, a represents a cylindrical of iiat sheets of suitable size and area to be roll, cushion, or pad, which is of a yielding wrapped as a scroll around the roll and nature and is mounted upon a rigid hub or 75 z 5 clamped thereto without cementing or othershaft adapted to be rotated by any suitable wise securing the edges of the 'sheet together means. The cushion may be composed of before the sheet is applied to the roll. It is felt or any other suitable yielding material desirable, however, -to give the sheet or blank adapted to afford the desired yielding supsuch form that when it is wrapped in the form port for the cover b. 8o 3o of a scroll upon the roll its overlapping or The roll is provided at its ends with suitouter edge will not extend in a straight line able means for clamping the end portions of lengthwise of the roll, but will occupy an obthe cover upon the cushion. Said means cornlique position, so that it will not be subjected prise clampingiingers h, which are radially to abrupt shocks or strains by contact with adjustable and arranged to bear upon the pe- 8 5 35 the work presented to the abrasive surface. riphery of the cushion, said fingers being In Letters Patent of the United States No. therefore adapt-ed to sink into the cushion 523,157 I have shown a yielding roll and an when moved inwardly. The ends of the cover abrasive cover thereon having one of its ends, b are placed between the iingers h and the which constitutes the overlapping end of the periphery of the roll, andthe iingers are then 9o 40 scroll, recessed and formed to lie diagonally adjusted inwardly and caused to clamp the upon the periphery of the roll, said recessed ends of the cover by indenting overlapping end having a reentrant angle at the center of portions of the cover and the cushion under the length of the sheet. I have found, howthose portions, as shown in Figs. 2and 3. The ever, that a sheet thus formed is objectionngers h are formed upon radial shanks h', 95 45 able because the portion of the edge which which are provided with studs h2, entering presents the said rentrant angle is subjected cam-shaped slots e' in collars i', which are to greater strain by contact with the work mounted to rotate upon the hub or shaft of than the other portions of said edge, so that the roll. lVhen the collars e" are rotated in the scroll is liable to be opened or expanded one direction, the lingers h are moved `outroo 5o at this point by the pressure of the work wardly, and when the collars are rotated in against the roll, so that the cover is liable to the opposite direction the ngers are moved inwardly. I have here shown one nger h at each end of the roll, but it is obvious that a plurality of lingers may be employed at each end of the roll, and that any other suitable means may be employed for causing the-iingers to indent the overlapping portions of the cover and force these portions into the cushion.

The cover, which for bufiing or abrading purposes, such as cleaning or bufiing the bottoms of boot and shoe soles, is made of sandpaper or emery-cloth, and for polishing purposes is made of silesia or other like material, is cut in a flat sheet of the form shown in Fig. 4. The tapering end of said sheet is applied to the left-hand end of the roll, and the sheet is wrapped about the roll until a portion of it overlaps the tapering end, and that end of the sheet is then secured by one of the clamping-lingers h. The remainder of the sheet is then wound upon the roll, its overlapping edge forming a helical line about the cushion, as shown in Fig. I by the full line, the dotted line showing the edge which is overlapped; that is, the acute-angled end x at the bottom of Fig. 4 is overlapped by the obtuse-angled portion y on the left of Fig. 4, and the acute-angled end x at the top of Fig. 4 overlaps the obtuse-angled portion y on the right of Fig. 4, the overlapping portions being depressed into the cushion by the fingers 71, as will be clear from Figs. l, 2, and 3.

I have found that the cover thus formed can be very quickly and smoothly applied to the roll, and that when the appliance is in operation the pressure of the work against it tends to tighten the cover upon the roll rather than to loosen the same. Hence there is no Wrinkling of the cover and no tendency of its edges to separate.

Another advantage of the spiral overlap is that when the cover is deflected inwardly by the pressure of the work against it the deiiection has no tendency topull the end portions of the cover from under the clamps, there being always one or more slip-joints in the cover between any two points at opposite ends of the roll, so that an inward deflection of the cover at any point takes place by a slight slip between the overlapping edges.

I claim- An appliance of the character specified, comprising a yielding-surfaced rotary roll, a flexible cover of substantially rhomboidal form wrapped about said roll, one of the edges of said cover overlapping the other and said edges extending helically from one end of the roll to the other, clamping-fingers projecting over the ends of the overlapping portions of the cover and movable toward and from the axis of the roll, so that they may sink with the corresponding portions of the cover into the yielding surface of the roll, and means for adjusting and holding said clamping-iingers.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 30th day of July, A. D. 1895.

HAROLD A. WEBSTER.

Witnesses:

C. F. BROWN, A. D. HARRISON. 

